Moderate severityNVD Advisory· Published Jul 9, 2026· Updated Jul 9, 2026
Open WebUI: `WEB_FETCH_FILTER_LIST` host allow/block filter bypassable via URL path and non-label-boundary matching
CVE-2026-59223
Description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.10.0, WEB_FETCH_FILTER_LIST matching compared configured host entries against URL strings and non-label-boundary suffixes, allowing path-based blocklist bypasses such as !internal.example.com in a URL path and sibling-domain matches that did not reflect the intended hostname policy. This issue is fixed in version 0.10.0.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
open-webuiPyPI | < 0.10.0 | 0.10.0 |
Affected products
1- Range: <0.10.0
Patches
Vulnerability mechanics
References
6- github.com/advisories/GHSA-qg3f-8x3j-ggf2ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-59223ghsaADVISORY
- github.com/open-webui/open-webui/commit/087878ce848a4d828012068b5997dac480f43656ghsax_refsource_MISCWEB
- github.com/open-webui/open-webui/pull/25949ghsax_refsource_MISCWEB
- github.com/open-webui/open-webui/releases/tag/v0.10.0ghsax_refsource_MISCWEB
- github.com/open-webui/open-webui/security/advisories/GHSA-qg3f-8x3j-ggf2ghsax_refsource_CONFIRMWEB
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